Expression	16 - 12 / 4	2 + 6 / 2	8 + 4*2	8+4 * 2	12/2 - 3	6/8 + 2
Value	13	5	16	16	3	2

The last result is correct. First 6/8 is done using integer division, resulting in 0. Then that 0 is added to 2.

Evaluation by Rewriting

When evaluating an expression, it can be helpful to do it one step at a time and to rewrite the expression after each step. Look at:

16 - 12 / 4

Do the division first, since it has highest precedence. Next, rewrite the expression replacing the division with its value:

16 - 3

Now evaluate the resulting expression:

You can write the process like this:

16 - 12 / 4
     ------
16 -    3
---------
   13

The dashed lines show what was done at each step.